Supplementing piston pin retainer information described on page 366 in the August Bulletin, it should be unnecessary to point out that the width of the retainer groove in the present connecting rod was reduced to correspond with the width of the new retainer, and that care must be used not to mix present production rods having the narrow retainer grooves with old style rods having the wider groove. Also to be sure to use the correct retainers with these parts.